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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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Related Experiment Video

Updated: Mar 10, 2026

Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
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Guided wave tomography with an improved scattering model.

P Huthwaite1

  • 1Imperial College London , Mechanical Engineering, Exhibition Road, London SW7 2AZ, UK.

Proceedings. Mathematical, Physical, and Engineering Sciences
|December 14, 2016
PubMed
Summary

This study introduces an advanced guided wave tomography method for accurate corrosion mapping in the petrochemical industry. The new technique improves defect imaging resolution and reliability, crucial for asset integrity assessment.

Keywords:
guided wavesimagingscatteringtomography

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Area of Science:

  • Non-destructive testing
  • Ultrasonic guided waves
  • Tomographic imaging

Background:

  • Accurate corrosion thickness mapping is vital for petrochemical industry asset integrity.
  • Guided wave tomography offers a non-invasive solution for mapping corrosion damage.
  • Traditional methods using dispersion relationships are inaccurate for non-uniform defects.

Purpose of the Study:

  • To develop a sophisticated inversion solution for guided wave tomography.
  • To improve the accuracy and resolution of corrosion thickness maps.
  • To account for complex guided wave scattering from defects.

Main Methods:

  • Utilizing guided wave tomography with advanced tomographic imaging.
  • Developing a novel inversion algorithm that considers full guided wave scattering.
  • Validating the method with simulated and experimental corrosion data.

Main Results:

  • Achieved higher resolution imaging (better than one wavelength) compared to traditional methods (two wavelengths).
  • Demonstrated accurate thickness map generation even with complex scattering.
  • Validated the algorithm's speed, stability, and robustness against noise and errors.

Conclusions:

  • The developed sophisticated inversion solution significantly enhances guided wave tomography for corrosion assessment.
  • This advanced method provides more accurate and higher-resolution thickness maps than traditional approaches.
  • The technique is reliable and suitable for real-world applications in the petrochemical industry.